I built STACK from scratch to stop juggling fitness apps. It’s an all-in-one native Android tracker. • AI Rep Counter: Uses phone camera & computer vision to auto-count reps in real-time. • Workout Tracker: Logging, custom timers & routines. • Nutrition: Barcode scanner for macros & calories. • Social: Feed & 1-to-1 messaging. Tech: Native Android, Health Connect, offline mode. I'd love your technical feedback on the AI!